Jiyoon and Jungkook were childhood friends, their bond sealed by their grandparents' promise of a future union. As children, they shared dreams and laughter, unaware of the weight of that promise. Fast forward to adulthood, Jungkook, deeply in love with someone else, is forced into marriage with Jiyoon, who believes he loves her. "Let's be together, forever," young Jungkook had said. But reality strikes harshly after their wedding. "I never wanted to be with you," Jungkook confesses, shattering Jiyoon's heart. Thrown into a marriage built on deception, they must navigate the storm of emotions and uncover whether love can truly grow from such bitter roots. "Unintended Union" is a gripping tale of heartache, resilience, and the search for true love against all odds.